Underground structure seismic damage process simulation is an effective means to study the underground structure aseismic performance. Through setting artificial boundary condition

taking dead weight stress of rock and soil mass as an initial state of dynamic response simulation

the static-dynamic coupling numerical simulation of earthquake response of the underground structures is realized. Based on finite element analysis software ABAQUS

taking ultimate shear strain as a failure criterion

the seismic damage process of underground structures is simulated by the birth-death element method. Considering structure depth

the influence of initial geostress on aseismic performance of underground structure is analyzed. The results show that the aseismic performance of underground structures has a most unfavorable depth

namely the most easily damaged depth in earthquake. When the depth exceeds the most easily damaged depth

the ultimate aseismic capacity of structures enhances. If the earthquake damage occurs

the damage degree of structures will be greater with the increasing of depth.